10 free, exam-style Qualified Behavior Analyst (QBA) (QBA) practice questions with answers and explanations. No signup required. Work through them below, then take the full free QBA practice test to study every exam domain.
The QBA exam has 125 questions and runs 3 hours.
These 10 free QBA questions are organized by exam domain, so you can see how each part of the Qualified Behavior Analyst (QBA) blueprint is tested. Reveal the answer and explanation under each question.
A child who has not had anything to drink for several hours begins requesting water more often and works harder to obtain it. The hours of no fluids have made water more valuable as a reinforcer. This effect is BEST described as a(n):
Correct answer: B - Establishing operation
A learner frequently shouts out during class. The teacher provides praise and a token only when the learner keeps their mouth closed and hands raised for an entire two-minute interval, because these responses cannot occur at the same time as shouting. This procedure is BEST identified as:
Correct answer: D - Differential reinforcement of incompatible behavior (DRI)
In a token economy, a client can exchange earned tokens for time on a tablet, a snack, or a preferred toy. Within this system, the tablet time, snack, and toy function as:
Correct answer: A - Back-up reinforcers
A teacher tells a class that everyone will earn five extra minutes of recess only if every single student turns in their homework. This arrangement is an example of which type of group contingency?
Correct answer: A - Interdependent group contingency
A behavior technician records a behavior as occurring if it happens at any point during each 10-second interval. Compared to continuous measurement, the data collected with this method will MOST likely:
Correct answer: B - Overestimate the true duration of the behavior
During a 20-minute observation, one observer counts 18 occurrences of hand-flapping and a second, independent observer counts 15. What is the total count inter-observer agreement (IOA)?
Correct answer: A - 83%
A behavior analyst reviews a line graph and notes that within the treatment phase the data path steadily rises from session to session. This ascending path is BEST described as the data's:
Correct answer: C - Trend
A functional analysis is conducted. Problem behavior occurs at high, steady rates during the condition in which the client is alone with no materials and no social consequences are delivered. This pattern MOST strongly suggests the behavior is maintained by:
Correct answer: D - Automatic (sensory) reinforcement
A behavior analyst wants to evaluate a new reading intervention but cannot ethically withdraw it once a child begins to read. The analyst instead introduces the intervention one at a time across three different students. Which experimental design is being used?
Correct answer: D - Multiple baseline design
A clinician presents an array of items, lets the child select one, and then removes the chosen item from the array for the next trial, continuing until all items are selected or ignored. This preference assessment format is called:
Correct answer: C - Multiple stimulus without replacement (MSWO)
The QBA exam also covers these domains. Drill them in the full free practice test:
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